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Plane: prevent a float exception at pitch 90

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this can happen with a tailsitter
This commit is contained in:
Andrew Tridgell 2017-10-30 15:19:01 +11:00
parent 1ad929c56e
commit 9709bca7b4
1 changed files with 5 additions and 3 deletions
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8
ArduPlane/navigation.cpp
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@ -156,9 +156,11 @@ void Plane::calc_gndspeed_undershoot()
Vector2f gndVel = ahrs.groundspeed_vector();
const Matrix3f &rotMat = ahrs.get_rotation_body_to_ned();
Vector2f yawVect = Vector2f(rotMat.a.x,rotMat.b.x);
yawVect.normalize();
float gndSpdFwd = yawVect * gndVel;
groundspeed_undershoot = (aparm.min_gndspeed_cm > 0) ? (aparm.min_gndspeed_cm - gndSpdFwd*100) : 0;
if (!yawVect.is_zero()) {
yawVect.normalize();
float gndSpdFwd = yawVect * gndVel;
groundspeed_undershoot = (aparm.min_gndspeed_cm > 0) ? (aparm.min_gndspeed_cm - gndSpdFwd*100) : 0;
}
}
}